Hydraulic stopper used for weighing apparatus

Abstract

The present invention relates to a hydraulic stopper used for a weighting apparatus. The technical solution is as follows: the top ends of pistons (7) of two hydraulic piston cylinders are semi-spheres; two side end planes of a coupler (3) are symmetrically provided with hollow semi-spheres; the semi-spheres at the top ends of the pistons (7) of two hydraulic piston cylinders (2) are respectivelyinserted into the hollow semi-spheres at both sides of the coupler (3), and the two hydraulic piston cylinders (2) are respectively connected with the coupler (3). An oil inlet (9) above a rodless chamber of two hydraulic piston cylinders (2), an oil outlet (13) below the rodless chamber and an orifice (11) at the end of the rodless chamber are correspondingly equipped with an oil feeding stop valve (8), an oil discharging stop valve (12) and an orifice stop valve (10). The discharging ports (14) below the rod chamber of two hydraulic piston cylinders (2) are communicated with atmosphere. Twobag type energy accumulators (1) are respectively connected with the corresponding orifice stop valve (10). The hydraulic stopper of the invention has the characteristics of large buffer capacity, convenient disassembly and assembly, simple maintenance, high reliability and long service lifetime.

Description

technical field [0001] The invention belongs to a limit device, in particular to a hydraulic limiter for a weighing instrument. Background technique [0002] As an important tool for measurement in modern industry and service industry, weighing instruments are widely used in factories, logistics and commercial trade, such as dynamic truck scales and dynamic rail scales. Since the weighing scale will be subject to a large impact during the weighing process, the relative position of the weighing scale platform and the load cell will change, which will seriously affect the accuracy of weighing. [0003] The limiter is mainly used to buffer the large impact caused by the weighing process, so as to ensure that the relative position between the scale platform and the load cell does not change. The commonly used limiters mainly include rigid limiters and spring limiters. Types of. The rigid limiter is characterized by low manufacturing cost and no buffering effect on the impact, ...

AI Technical Summary

Problems solved by technology

The rigid limiter is characterized by low manufacturing cost and no buffering effect on the impact, which will easily lead to a large change in the relative position of the weighing instrument platform and the load cell, which will seriously affect the accuracy of weighing. It is necessary to check the weighing instrument frequently. High maintenance cost; the characteristic of the spring stopper is that the spring has a large buffering effect on the impact, and the manufacturing cost is relatively high. Strong impact or long-term impact may easily cause spring fatigue failure, and the spring is not easy to replace, so the whole stopper has to be replaced , which also brings higher maintenance costs

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